Provided is a method of producing a polycarbonate-based resin composition, including mixing an aliphatic polycarbonate-based resin (A) containing a specific repeating unit (A-1), and at least one kind of aromatic thermoplastic resin (S) selected from the group consisting of an aromatic polycarbonate-based resin (B) containing a polycarbonate block formed of a specific repeating unit, an aromatic polyester-based resin (C) having a specific structural unit, and a polyarylate resin (D) having a specific structural unit in the presence of a transesterification catalyst at a temperature at which the resin components melt.

A rubber composition that includes a rubber component, an inorganic fiber material, and a coupling agent. The inorganic fiber material is one or more inorganic fiber materials selected from the group consisting of a magnesium sulfate fiber, a calcium silicate fiber, a potassium titanate fiber, an aluminum borate fiber, and a glass fiber.

A rubber composition that includes a rubber component, an inorganic fiber material, and a coupling agent. The inorganic fiber material is one or more inorganic fiber materials selected from the group consisting of a magnesium sulfate fiber, a calcium silicate fiber, a potassium titanate fiber, an aluminum borate fiber, and a glass fiber.

A method for forming a multilayer coating film comprising the steps of: (1) applying a base paint (X) to a substrate to form a base coating film, (2) applying an effect pigment dispersion (Y) to the base coating film formed in step (1) to form an effect coating film, (3) applying a clear paint (Z) to the effect coating film formed in step (2) to form a clear coating film, and (4) heating the uncured base coating film, the uncured effect coating film, and the uncured clear coating film formed in steps (1) to (3) to thereby simultaneously cure these three coating films; wherein the effect pigment dispersion (Y) contains water, a black pigment (A), a vapor deposition metal flake pigment (B), and a rheology control agent (C).

The present disclosure is to provide a vibration damping steel sheet having improved vibration damping performance. Provided according to the present disclosure are: a surface treatment composition for a vibration damping steel sheet, comprising a polymer resin and inorganic nano particles having a mean aspect ratio (L/D) of 100 or more; and a vibration damping steel sheet surface-treated with the composition.

A wet friction material includes a base including a matrix of fibers and filler particles embedded in the matrix of fibers; a binder embedded in an interior of the base; and a quaternary ammonium salt containing coating on an outer surface of the base. The quaternary ammonium salt containing coating can include a quaternary ammonium salt and a solution binder.

A wet friction material includes a base including a matrix of fibers and filler particles embedded in the matrix of fibers; a binder embedded in an interior of the base; and a quaternary ammonium salt containing coating on an outer surface of the base. The quaternary ammonium salt containing coating can include a quaternary ammonium salt and a solution binder.

The present invention relates to a thermal conductive layer that includes at least one filler, has a thermal diffusivity of 5.0×10.sup.−7 m.sup.2s.sup.−1 or more, and has a volume resistivity of 1.0×10.sup.11 Ω.Math.cm or more. Further, the present invention relates to a photosensitive layer to which the thermal conductive layer is applied, a photosensitive composition, a manufacturing method for a thermal conductive layer, and a laminate and a semiconductor device.

The present invention relates to a thermal conductive layer that includes at least one filler, has a thermal diffusivity of 5.0×10.sup.−7 m.sup.2s.sup.−1 or more, and has a volume resistivity of 1.0×10.sup.11 Ω.Math.cm or more. Further, the present invention relates to a photosensitive layer to which the thermal conductive layer is applied, a photosensitive composition, a manufacturing method for a thermal conductive layer, and a laminate and a semiconductor device.

A joining material for laser welding, a laser welding method using the same, and a laser joined body using the laser welding method. The joining material includes a polymer matrix and a needle-shaped inorganic filler. The polymer matrix includes a polypropylene resin having a melt index of 80 g/10 min or more to 95 g/10 min or less as measured at a temperature of 230° C. and a load of 2.16 kg, and the needle-shaped inorganic filler has an aspect ratio of 10:1 to 20:1.